Improvement in middlings-purifiers



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Midd|ingsPurifiers.

Patented Sept. 22,1874.

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. UNITED STATES PATENT OFFICE.

WILLIAM H. LAMB, OF ELKHART, INDIANA.

IMPROVEMENT IN MlDDLlNGS-PURIFIERS.

Specification forming part of Letters Patent No. 155,316, datedSeptember 22, 1874; application filed November 13, 1873.

' rial and convey portions of the same to the first bolting-reel to beagain rebolted and separated, the operation being continued as long asis requisite.

The present improvements are fully hereinafter described, and pointedout in the claim, the object being to render such class of machines morecompact, perfect, and effective in operation.

In the drawings, Figure 1 represents a side elevation of my apparatus,and Fig. 2 a ver tical section thereof.

In the present instance I have illustrated two compartments orbolting-chests, A and B. In the upper portion of the casing O isjournaled the conveyer-shaft D, and onto which the iniddlings areintroduced by the opening D. This shaft conveys such material to thevertical passage F at the side of the casing, when it falls onto theshelf a, from which it passes into the first of the taperingboltingrecls G, which, revolving, sifts the finer grade of flour ontothe second conveyer-shaft I imniediatel y beneath it, the coarsermaterial passing out the spout H at the larger end of the reel G into asuitable receptacle. That material which passes through the first reelonto the conveyer-shaft I is, by the latter, delivered to the passage Fand falls onto the shelf 0, and passes into the second reel K, thesecond finer grade being sifted or bolted onto the conveyer M, and thecoarser grade passing by the spout L onto the elevating-belt, whichconveys it upward to the first conveyer-shaft D, to be delivered asecond time to the reels and rebolted. At one side of the casing isarranged an exhaust-fan, E, which draws the light dust, &c., from theentire length of the conveyer-shaft D, drawing the said dust, 850.,intothe horizontal passage B and out through the opening Q, the airnecessary for such operation entering through the opening G, which isdirectly beneath the passage 13, and in the same compartment with theconveyer D, and the said passage can be closed by the slide d at the endof the same, as shown, when it is desired to regulate the draft. Theboltingcloth of the reels is of different grades, and is secured to theinside of the supporting-bars, furnishing an unbroken bolting-surface.In order to draw 011' the dust, &c., from the bolt ing-chest, I arrangeone end of a pipe, B to communicate with said chest, and the other endcommunicating with the horizontal airpassage B, as shown.

What I claim is- The combination of the horizontal air-pas sage Band-exhaust-fan E at the top with the conveyer D beneath saidair-passage, the tapering reel Gr, conveyer I, tapering reel K, andconveyer M, the whole communicating with each other, and constructed andarranged to operate, in respect to the elevator O, as herein shown anddescribed.

WILLIAM H. LAMB.

Witnesses GEO. W. BEsT, En. R. KIRS'IEIIER.

